diff --git a/http-parser.js b/http-parser.js
index 4183893..03caa04 100644
--- a/http-parser.js
+++ b/http-parser.js
@@ -83,7 +83,7 @@ HTTPParser.prototype.close =
 HTTPParser.prototype.pause =
 HTTPParser.prototype.resume = function () {};
 HTTPParser.prototype._compatMode0_11 = false;
-HTTPParser.prototype.getAsyncId = function() { return false; };
+HTTPParser.prototype.getAsyncId = function() { return 0; };
 
 var headerState = {
   REQUEST_LINE: true,